Successful combination of chemical and biological treatments forthecleaning of stone artworks

Federica Troiano, Davide Gulotta, Annalisa Balloi, Andrea Polo, Lucia Toniolo, Emanuela Lombardi, Daniele Daffonchio, Claudia Sorlini, Francesca Cappitelli*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

The removal of sulphate-based crusts from stone artworks using sulphate-reducing bacteria (SRB) has been proven to be an effective cleaning procedure. However, some concerns still remain: it is a time-consuming process when the crust is thick, and it is not clear how the biotechnological approach can fit within a complex conservation treatment. To address these challenges, the effects of an SRB strain (Desulfovibrio vulgaris subsp. vulgaris ATCC 29579) coupled with a non-ionic detergent pre-treatment was studied on a stone column affected by black crusts. The coupling of the two treatments removed the black crust without affecting the original sound marble, with 38% reduction in cleaning time. The combined method was later applied to a one-century-old artistic marble statue weathered by sulphate-based crusts and grey deposits. The detergent used alone effectively removed the grey deposit, but not the black crust. However the co-treatment synergy resulted in the complete removal of the black crust layers, with the added advantages, compared to the biocleaning alone, of fewer biological applications and a 70% reduction in total cleaning time, but still retaining all the advantages of the biocleaning approach.

Original languageEnglish (US)
Pages (from-to)294-304
Number of pages11
JournalInternational Biodeterioration and Biodegradation
Volume85
DOIs
StatePublished - Nov 1 2013

Keywords

  • Artistic stone
  • Biocleaning
  • Black crusts
  • Grey deposit
  • Sulphate-reducing bacteria
  • Synergic cleaning

ASJC Scopus subject areas

  • Microbiology
  • Biomaterials
  • Waste Management and Disposal

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